The remnants of dozens of mammoths whose furs, tissues and internal organs were preserved intact for thousands of years in the ice and permafrost of Siberia have been examined by scientists who autopsied the bodies determined that many of these animals died suddenly as a result of fatal falls into crevices and holes hidden in the terrain. Other are believed to have died during violent blizzards that got the mammoths into a state of hypothermia very quickly.
The main reason why the United States sent economic aid and military advisers to South Vietnam was because they wanted the South Vietnam to win their fight over the North Vietnamese, who were communist. We also wanted to limit the number of American troops we sent into the conflict.